Real-time image encryption algorithm based on a 1D cascaded chaotic map and finite field diffusion
Quanyv Wang, Yalong Yang, Xiaoqiang Zhang · Journal of Electronic Imaging · 2025
As multimedia technology continues to rapidly advance, the application of digital images becomes increasingly widespread. However, the accompanying image security issues cannot be ignored. To meet the demands of real-time image cryptosystems, we propose a real-time image encryption algorithm (IEA) utilizing the designed one-dimensional chaotic map, chaos-based Sattolo’s shuffling, and finite field diffusion methods. First, two pseudo-random sequences are generated using the designed chaotic map, and these sequences are then employed to facilitate the scrambling and diffusion processes. Second, the designed chaos-based Sattolo’s shuffling is utilized to scramble the plain image. Third, the designed finite field diffusion method is applied to diffuse the scrambled image. Last, the proposed IEA is verified to possess robust security and a very short encryption time through analyses of its key space, key sensitivity, statistical properties of encrypted images, plaintext sensitivity, encryption time, and computational complexity.